package lzit.util;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;

public class DBUtil {
    public static Connection getCon() {
        try {
            // 假设使用MySQL数据库
            String drivername = "com.mysql.cj.jdbc.Driver";
            String conUrl = "jdbc:mysql://localhost:3306/nieh";
            String username = "root";
            String password = "root";

            Connection con = null;
            Class.forName(drivername);
            con = DriverManager.getConnection(conUrl, username, password);
            return con;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    public static void release(ResultSet rs, Statement stmt, Connection con) {
        if (rs!= null) {
            try {
                rs.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
            rs = null;
        }
        if (stmt!= null) {
            try {
                stmt.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
            stmt = null;
        }
        if (con!= null) {
            try {
                con.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
            con = null;
        }
    }
}
